Equalizing triple-pressure-retaining mechanism.



No. 895,957. PATENTED AUG. 11, 1908.

, B. GANELL. EQUALIZING TRIPLE PRESSURE RETAINING MECHANISM;

APPLICATION FILED OCT. 12, 1907. v

BENJAMIN OANELL, OF WEST SPRINGFIELD,MASSACHUSETTS.

EQUALIZING TBIPLEPRESSURE BETAINING MECHANISM.

Specification of Letters Patent.

I rammed Aug. 11,1908.

Application filed. October 12, 1907. Serial No. 397,065.

Hampden and State of Massachusetts, have invented new and useful Improvements in Equalizing Triple-Pressure-Retaining Mech- I anism, of whio the following is a specification.

Thls invention relates to im rovementsin square inch.

fluid pressure-air brakes, its 0 ject being to rovide a mechanism that will retain the air in the brake cylinder and at the same time permit the auxiliary reservoir to be recharged with the brakes on, thereby effecting a saving in the amount of air used for braking the train and at the same time preventing a train from getting beyond the control of the engineer.

A further object of the device is to permit the attachment of my'improvement to the systems now in use, articularly the Westinghouse or New Yor air-brake systems; a

further object lying in the equalization of the" air from the auxiliary reservoir-tothe train line, thereby doing away withthe overcharge of the train line and brakes creeping on when the cars are cut from the engine.

In the drawings forming part of this'a plication, -Figure 1 is a top' plan view 0 "my improvement, and Fig. 2 18 a vertical section on the line 2- 2'of Fig. 1.

Referring to these drawings in detail, a,

designates the main casing 0 my improvement in which the piston bis mounted for reciprocation therein. 'Bolted to the casing a is an extension piece 0 in the up er end of which is located a threaded plug which engages a spring e that is normal y placedunder a tension of five pounds or more to the f designates the usual auxiliary cylinder that is connected with the interior of the exb means of the pi e g.

f designates the usual brake cy inder.

h'designates a hearing or seat for the piston b when in an elevated position. This piston is provided with a cylindrical de ending stem 4'. that is mounted 1n the hub or oss element 7' of the casing a, and which is so constructed as to have a sliding fit within the boss element. The lower end of the stem element is formed into a valve with the conical sides k that engage the seat portion m of the cylindrical part 0 that is suitably bolted 17 designates a plate to the main cylinder or casing a by means of thebolts p and Mounted within the enlarged portion r of the piston 11 are two valves .9 and t which are secured to a stem (:1. that passes through an opening v in the enlar ed portion 1'. The valves s and. t serve to c' ose the assage-way through the piston bu. Suita le tension springs w and :1: are provided for the valves 8 and t, which hear at their inner ends on the shoulder portion of the opening '0. A nut 31 is threaded onto the upper end of the stemfiu for lockingthe valves 8 and. t to the stem.

The cylindrical part-0 has a bored out por-' tion z in which ismounted a piston 2 that is normally pressed towards the left by means ofthe spring 3, suitable tension bein placed thereon by means of a plug 4 that is t readed. into the end of the part 0; a-stem 5 being attached to the piston 2 and mounted for reci rocation in the opening 6 of theplug 4. The inner face of the plug is provided with a washer or'packing 7 against which the shoulder 8 of the stem toward the right. 9 designates a port or o ening communicating with the interior of t e bored out part 2. 11 desi ates an arm securedto the opposite side 0 the iston 2 for the purpose of supporting the va ve 12 in its outer end; This .valve is designed to cover a port 13. is mounted in the arm 11 and isnormally drawn downwardto its seat by means of the spring 15 and cotter-pin 16.

that .is mounted in the cylindrical art o'op osite the end of the stem 14 and is held in place by means of the screws 18. The object of this plate is for the purpose of .placingthe 5 ring 15, andcotterpin-16 on the stem 14 an into the opening of thearmlL a 19 designates' a pipe that leads from the exhaust port of the triple valve 19 and o om. municates withthe interior-of the casing 20 which is cast integral with the main easing a,

Mounted within the casing 20 are .two

ga ing the seat 23,v by gravity alone; the va ve 22, however, is held in contact. with the seat 24 by means of the coiled sprin 25 which is forced upwardly bymeansn the plug 26. A plug 27' is used to close the upper end of the casing 20. A pipe 28 connects the interior of the casing 20 with the interior of the casing a. v v

5 strikes when moved The stem 14 of the valve 1.2

4 valves 21 and 22,the'valve 21-normal1y enserves to supply air to t e auxiliary reservoir from the mam res ervoir-onthe engine, and under the control of theengineer, which is the usual practice.

Referring to the operation of my invention: The and the train-pipe 29 is, under running conditions', practically 70 lbs., to the square inch, but when an application of the brakes is made in the usual manner by reducingthe' pressure in the train-pi e (which is generally a five pound reduction, it permits the air to flow from, the auxiliary cylinder f to the auxiliary cylinder willserve to hold t cause the air that being 5 lbs.-, 7 together make 70 lbs.

brake cylinderf. Since the ressure in the is reduce to 65 lbs., it

e piston b downward, be-

asses throu h the pipe 9 being 65 lbs., and lie tension 0? When the engineer brings his valve back into running position bringing the pressure in the train-pipe up to 70 lbs., by means of the reducing valve on the engineers valve, it will not cause the piston b to move from its seatm, and as a result preventing an 7 port of the triple valve to escape to the atof this operation the triple valve is moved release osition, but the aircan not escape-throng I the fport30 since the same is closed by means 0 he valve-stem 11, thereby flow of air-from the exhaust mosphere through the'exhaust-pipe 19, valve 21, through pipe 28 into the chamber a through the port 30.into the chamber 0 operatin .the iston 2, whereby the portQ conhecte to-t" eatr nosphere is closed. After '1 every ap lication, the engineerwill "always have 701 fvalves s. -of air to brake with, if he so de sires.

Referring. now to. the

operation of the valves 8 and t, and what I term equalizing Their use does away with the ordinary leakage groove in the brake cylinder, thus preventin the application of the brakes f10n 1 l38,kll1 fp ace automatically when the' car iscut o rom'the train; The brakemen are not obliged, as usual, to bleed .the .cars

11 the operation of the valves 8 and t and the emp oymentjofthe weak springs x and w to maintain-both valves 8 and t open, and normally having a leakage groove around-fin the stem, I provide for an eak in the train line that'may o'ccur,that 1s ass from the auxiliary ves's and t wouldnclose these valvesvfrom either side, the. leakage grooves around to would not carry sucha large volume of air.

the 1 stem- In the operation of the valves 21 a1id 22 I the valve 21 being a check-valve e'rmitsair to pass from the exhaust-port o the triple pressure in the auxiliary, cylinder f the sprlng e or more, the two pressures will,

them off from the train, as 5 brake 0 the air to pass through the- Y ipe 28 into t e chamber a} of the casing a, but it can go no farther since the stem i and valve 12 are normally closed. This valve 21 also prevents any leakage of air that might escapeby the piston-stem i into the exhaustpipe 19 which is attached to the exhaust-port -of the triple valve 19 and might interfere with the ro er workings of the same and apply the bra es. The excess pressure valve 22 is slidably mounted in the casing 20 and provided with a graduating spring 25. When the passa e of the air inthe brake cylinder f 1 is more t an the car is designed to take in order to apply the proper leverage, this spring 25, being raduated to any suitable pressure, would a ow any excess pressure in thebrake cylinder to escape to the atmosphere.

Referring now to the operation of the is ton 2 in the casing o 1n releasing the bra es by throwing the main pressure into the train plpe 29 and causing this superiorpressure on the under side of the piston b, thereby lifting the same a ainst its seat h and unseating at k and o ening the port 30, 'thus allowing the confined air in the chamber a and its communicating pipes to. pass from the exhaust port of the t i le valve and pass through the port 30 into t e chamber 0, moving. the iston2- towards the right and carrying wit it the slide valve 12. This operation uncovers the port 9, also opening the port 1.3'a1-1d thus allowing the air to pass into the atmosphere through the port 9, thereby releasing the brakes.

Referring now to the object-and use of the 'valve 12 When an application of the brakes is made, the ressures in the auxiliar voir and. train-pipe line sometimes ecome equal to each ot or This equalization of the pressures fre uently, occurs before the brakes are fully rgleased, and on account of the pressures onrboth sides of the piston b becoming equal, the stem' 'i' will close the port- .30;and shut ofi the flow of the exhaust air from the chamber a to the atmosphere. The piston-head 2 will, however, remain in a ositlon at the right hand end of the casing 0 ecause the 's ring 3 is of weak tension, and therefore it W1 1 hold the valve 12 so as to uncover the port 13. The exhaust air in the chamber a, thenfreely-esca s through the port 9 to the atmos here until the brakes are ully'released. W'llien this condition occurs the spring 3 will move the slide valve 12 back again and cover the port 13 so that another application of the brakes can be made whenevernecessary.

What I claim, is 1. In combination reserwith the train pip, linder, auxiliary reservoir, and triple valve 0 a fluid pressureb'rake mechanism, a cylinder a piston therein, a second cylinder attached to said cylinder and in communiing in combination with the ordinary train pipe, auxiliary reservoir, brake cylinder, and triple, valve, a main cylinder, a piston there 'in, a second cylinder attached to said cylinder, 3. spring therein bearing on the piston, means for adjusting the tension of thespring, a pipe connection between the,second cylinw der and the brake cylinder and above the piston in the main cylinder, the provided with a stem portion or normally closing a port in the main cylinder and between the exhaust opening of the tri le valve and theatmosphere, the train pipe l ing connected to the main cylinder and below the piston therein whereby, when an aplication of the brakes is made air is retained in the brake cylinder and the auxiliary reservoir can be repeatedly recharged, and whereby when the brakes are to be released the piston and its stem will be elevated and the exhaust port of the triple valve placed in communication with the atmosphere, as described.

3. In a fluid pressure brake mechanism, a main cylinder, a piston therein, er ualizing valves located in the body portion of the piston and normally affording a bypass for the air to either side of the same, the piston having communicating means on opposite sides thereof with the auxiliary reservoir and trainpipe respectively, whereby the pressures above and below the same are normally equalized, and whereby when a sudden pressure is made either above or below the piston the e ualizing valve on that side of the piston will close and permit an application or release of the brakes, as described.

4. A fluid pressure brake mechanism having in combination, a main cylinder, a piston therein and provided with a stem for normally closing a port in the main cylinder which connects with the exhaust port of the triple valve, a casing secured to the main casing, a piston mounted therein, a alvciston being carried by the last-named piston and normally closing a communication leading from the main cylinder and easing, a spring for normally holding the piston so as to close ,said communication,-whereby when a release of the brakes is made, thestem will be elevated, and the ports between the exhaust port of the triple valve and atmospherewill e opened;- I I 5. Incombination; a main.casing,.a piston therein, a stem carried by the piston and normally closing a port in the casing, the trainpipe being connected below the piston, a check-valve located between the stem and wherebyany leakage from the train pipe to the triple valve is prevented.

6. In combination, a main cylinder, asec- "the exhaust opening of the triple valve,

0nd cylinder connected thereto, an excess pressure valve located adjacent the exhaustport of the triple-valve, whereby when an excess pressure in the brake cylinder occurs, the valve willv open communication to the atmosphere, as described.

7. In combination, a main cylinder, a-piston therein, a stem carried thereby, a spring for holding-the piston downward, the trainpipe and air reservoir being connected above and below the piston, the stem normally closing communication between the exhaust port of the triple-valve and the atmos here; a cas ing connected to the main cylin er, a piston therein normally closing an atmospheric opening in the walls thereof, a'valve operated from the last named piston, said valve serving to maintain the atmospheric'o ening controlled thereby open until the brakes have been fully released, when a superior pressure is applied to the lower side of the piston in the main cylinder, as described.

8. An air-brake mechanism having in cornbination with the train-pipe, auxiliary reservoir, and triple valve, a cylinder, '8. iston therein, a second cylinder provided wlth an atmospheric opening, a piston for controlling said opening, and means carried by the piston for controlling the movements of said second piston,-whereby the auxiliary reservoir may be charged with the brakes on.

, BENJAMIN CANELL. Witnesses:

K. I. CLEMoNs, .llARRY W. BOWEN.

It is hereby certified that in Letters Patent N 0. 895,957, granted August 11, 1908, upon the application of Benjamin Canell, of "West Springfield, Massachusetts for an improvement in Equalizing Triple-Pressnre-Retaining Mechanism, an error appears requiring correction, as follows: At the heading of the drawing, the number of the patent 805,957 should read 895,957; and that the said drawing should be read with this correction therein that the same may conform to the record of the case in the Signed and sealed this 10th day of November, A. 1908.

[snar C. (J. BILLINGS, Acting Coni'iifiisn'nner of Patents.

ing in combination with the ordinary train pipe, auxiliary reservoir, brake cylinder, and triple, valve, a main cylinder, a piston there 'in, a second cylinder attached to said cylinder, 3. spring therein bearing on the piston, means for adjusting the tension of thespring, a pipe connection between the,second cylinw der and the brake cylinder and above the piston in the main cylinder, the provided with a stem portion or normally closing a port in the main cylinder and between the exhaust opening of the tri le valve and theatmosphere, the train pipe l ing connected to the main cylinder and below the piston therein whereby, when an aplication of the brakes is made air is retained in the brake cylinder and the auxiliary reservoir can be repeatedly recharged, and whereby when the brakes are to be released the piston and its stem will be elevated and the exhaust port of the triple valve placed in communication with the atmosphere, as described.

3. In a fluid pressure brake mechanism, a main cylinder, a piston therein, er ualizing valves located in the body portion of the piston and normally affording a bypass for the air to either side of the same, the piston having communicating means on opposite sides thereof with the auxiliary reservoir and trainpipe respectively, whereby the pressures above and below the same are normally equalized, and whereby when a sudden pressure is made either above or below the piston the e ualizing valve on that side of the piston will close and permit an application or release of the brakes, as described.

4. A fluid pressure brake mechanism having in combination, a main cylinder, a piston therein and provided with a stem for normally closing a port in the main cylinder which connects with the exhaust port of the triple valve, a casing secured to the main casing, a piston mounted therein, a alvciston being carried by the last-named piston and normally closing a communication leading from the main cylinder and easing, a spring for normally holding the piston so as to close ,said communication,-whereby when a release of the brakes is made, thestem will be elevated, and the ports between the exhaust port of the triple valve and atmospherewill e opened;- I I 5. Incombination; a main.casing,.a piston therein, a stem carried by the piston and normally closing a port in the casing, the trainpipe being connected below the piston, a check-valve located between the stem and wherebyany leakage from the train pipe to the triple valve is prevented.

6. In combination, a main cylinder, asec- "the exhaust opening of the triple valve,

0nd cylinder connected thereto, an excess pressure valve located adjacent the exhaustport of the triple-valve, whereby when an excess pressure in the brake cylinder occurs, the valve willv open communication to the atmosphere, as described.

7. In combination, a main cylinder, a-piston therein, a stem carried thereby, a spring for holding-the piston downward, the trainpipe and air reservoir being connected above and below the piston, the stem normally closing communication between the exhaust port of the triple-valve and the atmos here; a cas ing connected to the main cylin er, a piston therein normally closing an atmospheric opening in the walls thereof, a'valve operated from the last named piston, said valve serving to maintain the atmospheric'o ening controlled thereby open until the brakes have been fully released, when a superior pressure is applied to the lower side of the piston in the main cylinder, as described.

8. An air-brake mechanism having in cornbination with the train-pipe, auxiliary reservoir, and triple valve, a cylinder, '8. iston therein, a second cylinder provided wlth an atmospheric opening, a piston for controlling said opening, and means carried by the piston for controlling the movements of said second piston,-whereby the auxiliary reservoir may be charged with the brakes on.

, BENJAMIN CANELL. Witnesses:

K. I. CLEMoNs, .llARRY W. BOWEN.

It is hereby certified that in Letters Patent N 0. 895,957, granted August 11, 1908, upon the application of Benjamin Canell, of "West Springfield, Massachusetts for an improvement in Equalizing Triple-Pressnre-Retaining Mechanism, an error appears requiring correction, as follows: At the heading of the drawing, the number of the patent 805,957 should read 895,957; and that the said drawing should be read with this correction therein that the same may conform to the record of the case in the Signed and sealed this 10th day of November, A. 1908.

[snar C. (J. BILLINGS, Acting Coni'iifiisn'nner of Patents.

Correction in Letters Patent No. 895.95?-

It, ib hereby certified that in Letters Patent; No. 895,957, granted August 11, 1908, upon the appiication of Benjamin Canell, of \Vest Hpringfield, Massachusetts, for an mprovement in Equalizing Triple-PressurcJirmining Mechanism, an error appears requiring correction, as follows: At the heading of the drawing, the number of the patent 805,957 should read 895,957; and that the said drawing, should be read with this correction therein that the same may conform to the record of the case in the Pan-mt Office.

Signed and gealed this 10th day of November, A. D., 1908.

[SEAL] C. U. BILLINGS,

Acting Commisa ner of Patcnta. 

